Furnace-arch construction



B. DOBIE FURNACE ARCH CONSTRUCTION May 20, 1930.

4 Sheets-Sheet Filed Feb. 21, 1924 157 Mails/wok ATTORNEYJ May 20, 1930. B D BIE 1,759,045

FURNACE ARCH CONSTRUCTION Filed Feb. 21, 1924 4 Sheets-Sheet 3 WIT/V535 May 20, 1930.

B. DOBIE FURNACE A RCH CONSTRUCTION 4 SheetsSheet Filed Feb. 21, 1924 INVENTOR ATTORNEYJ Patented May 20,- 1930 UNITED STATES PATENT OFFICE, 1

BRADLEY DOIBIE, OF ELMHURST, NEW YORK, ASSIGNOR TO AMERICAN ARCH COMPANY,

I A CORPORATION OF DELAWARE summon-Anon CONSTRUCTION Application filed February 21, 1924. Serial No. 694,313.

My invention relates to furnace arch construction, and is especially concerned with the construction of the so-called nose and ignition portions of such arches, and the like. For convenience and brevity, both ignition and nose structures proper may conveniently be referred to as noses. I aim to.

simplify and improve the nose construction generally; to make the first cost of such noses relatively low; and to minimize. the subsequent expense for maintenance and repalr. How these and other advantages can be realized in a novel manner through my inventlon will appear from my description hereinafter of selected and referred embodiments.

In the drawmgs, Fig. 1 shows a vertlcal section through a nose construction conveniently embodying my invention.

Fig. 2 is a fragmentary sectional view, taken as indicated by the line 22 1n Fig. 1.

Fig. 3 shows a longitudinal section through a steam boiler furnace arch with a somewhat different nose construction.

Fig. 4 is a similar fragmentary view of the latter nose construction on a larger scale than Fig. 3, at a different point in the arch transversely of the furnace.

. Fig. 5 is a fragmentary sectional v1ew,

taken as indicated by the line 5-5 in Fig. 4. t

Fig. 6 is a view similar to Fig. 3, illustrating a different embodiment of my invention in both nose proper and ignition structures.

. Fig. 7 is a fra mentary sectional view similar to Fig. 5, ta 7-7 in Fig. 6.

In Fig. 1, the main furnace arch is represented by a transverse bun of brick 8, wlth undercut heads 9 engaged y angle bar runners 10 held by clips 11 and suspended from any suitable means of support. The particular bung shown in Fig. 1 is suspended from part of-the supporting means for the ad acent ch as indicated by the line furnace nose, as will appear more fully hereinafter, and its brick 8 have a rabbeted shoulder conformation 14 for engaging and supporting filler brick (not shown) forming part of the main arch.

The nose 20 shown in Figs. 1 and 2 con prises sets of main brick 21 arranged in pairs, fantailwise, with their laterally undercut heads 22 back to back and held between clips portingmember 27 (of T section) that is supported from a couple of I beams 28 extending transversely of the furnace. Preferably, the

space between the I beams 28 is open through the side walls of the furnace, for circulation of air to cool the nose 20. As here shown,'the member 27 is supported by means of a clamp 29 resting on the inner lower flanges of the beams 28 and bolted to the top flanges of said member 27. The main arch brick 8 adjacent the nose 20 aresuspended from the corresponding ends of the supports .27, as by means of claws 59 taking through openings in these members 27. On the opposite ends ofthe supports 27 rest curtain brick 31 that overlie the fantail brick 21. In the present instance, there is a space between the brick 31 and 21, which is filled by brick 51 resting on the latter, and byrefractory cement or fireclay 61. All the various joints in the main and nose arches may be made tight with fireclay or other refractory cement, as usual.

Between the sets of main nose brick 21 are fantail sets of double filler nose brick 35 (Fig. 2) supported by the brick 21 by virtue of shoulder and rabbet engagement at 36. As will readily be seen, the weight of the brick 8 at one side of the fantail sets serves or tends to balance the brick 31, etc. at the other side.

All the metal supporting parts of the nose structure 20 are well protected, and all the brick are readily removable and re laceable. By withdrawing the brick 51, the antail 21 can be worked upward through the clips 23 and rmoved,or replaced in a reverse manner,without disturbance of the brick 31 or of the superjacent refractory wall represented by the brick 39 resting on the beams 28 and on the brick 31. Removal of main nose brick 21 frees the corresponding filler brick 35 at either side for lateral displacement and endwise Withdrawal outward.

The main arch 7 shown in Figs. 3 and 4 comprises a series of bungs extending transversely of the furnace, including bung brick 8 with heads 9 engaged by angle barrunners 10 held by clips 11 and suspended from beams 12 also extending transversely of the furnace,or from other suitable supports. Between the bung brick 8 are pairs of double filler brick 13, 13 supported by them through any suitable form of engagement, such as the rabbet and shoulder conformation 14. The ignition arch shown comprises brick 15 suspended by hangers 16 from supporting means including the channel 17, as well as overlying briiczk 18 011 which the adjacent filler brick 13 res Inasmuch as the construction of main and ignition arches shown in Figs. 3 and 4 forms no part of my present invention, it is unnecessary to describe it further here.

The nose arch 20 associated with the main arch 7 Comprises sets of main brick 21 arranged in pairs, fantailwise, with their laterally undercut heads 22 back to back and held between clips 23 bolted at opposite sides of sector-shaped supporting plates 24. As here shown, the supports 24 have at their rear edges depending lugs or flanges 25 for the lowermost brick heads 22 to rest against. At its upper edge, each support 24 has double claw feet 26 that take over the lower flanges of a supporting member 27 that is itself supported from a couple of I beams 28 extending transversely of the furnace, by means of .a clamp 29 bolted fast to the upper flanges of the member 27. As shown in Figs. 3 and 4, the main arch brick 8 adjacent the nose 20 are suspended from the corresponding ends of the supports 27. On the opposite ends of the supports 27 are bearing lugs 30 whereon rest curtain brick 31 that overlie the fantail brick 21. These brick 31 are recessed at 32 to afford pivot seats for the lugs 30, and have portions 33 to engage the ends of. the supports 27 and keep the brick 31 from tilting too far (counterclockwise) on the bearings 30, as their unbalance would otherwise cause .them to do. As will readily be seen, the

Weight of the brick 8 at one side of the fantail sets serves to balance the brick 31 at the other side.

Between the sets of main nose brick 21 are fantail sets of double filler nose brick 35 (F1 5), supported by the brick 21 by virtue of s oulder and rabbet engagement at 36. In the intervals between the main supports 27 are auxiliary supports 37 that support the curtain brick 31 corresponding to the filler brick 35. In the present instance, these supports 37 are not required to help support the adjacent main arch brick 8 Preferably, the space between the I beams 28 is open through the side walls of the furnace on which these rest, for circulation of air to cool the nose 20.

It will be seen that all the metal supporting parts of the nose structure 20 are well protected, and that all the brick are readily removable and replaceable. To remove and replace one of the curtain brick 31, it is only necessary to withdraw the corresponding brick 38 (Fig. 3) at the base of the superjacent wall 39. After this has been done and the curtain brick 31 lifted out, the corresponding brick 21 can be worked upward through the clips 23 along the outer edge of the plate 24 and removed,-the grooves beneath their heads 22 permitting them to pass from clip to clip despite the relative angularity of the clips. Removal of main brick 21 frees the corresponding filler brick 35 at either side for lateral displacement and endwise withdrawal outward.

As shown, the various joints in the main and nose arches are made tight with fireclay or other refractory cement, as usual.

In Fig. 6, the main arch 7 is composed of bungs extending lengthwise of the furnace instead of transversely. The runners 10 for the bung brick 8 have the form of channels of sufficient depth and rigidity to dispense with support at frequent intervals; they are held properly spaced by clips 40, and suspended from a couple of I beams 41 extending transversely of the furnace, by means of double hangers 42 taking over the lower I beam flanges. As the construction of this main arch 7 forms the subject of my copending application Serial No. 671,058, filed Oct. 26, 1923, it need not be further. described here.

The nose" constructions 44 and 45 at the ends of the main arch 7 resemble that shown in Figs. 35, and are themselves even more nearly alike. It will suflice, therefore, to describe briefly the features of the ignition arch 44 that distinguish it from the nose 20 in Figs. 35marking similar parts and features with the same reference characters as in Figs. 3-5, as a means of dispensing with merely repetitive description,and then to describe briefly the specially distinctive features of the nose proper at 45.

In the ignition arch construction of Figs. 6 and 7, the fan-like sets of main nose brick 21 are supported directly by pairs of the sector shaped plates 46, which have engagement means 47 in the form of laterally projecting lugs or flanges along their outer edges, to take the place of the pair of clips 23 on each plate 24 in Figs. 3-5. The plates 46 are secured to the channel beam supports 28 by means of clamps 29 bolted to lateral flanges 48 at the upper edges of the-plates. To help support the superjacent brickwork 49, the plates 46 have nose portions 50 projecting from their outer edges, with continuations of the flanges 48 at their own upper edges. As shown, brick 51 rest on the brick 21 and 35, below the flanges 48; they can be readily removed for replacement,-or for removal and replacement of the brick 21 or 35, as described above in connection with Figs. 3-5 and the brick 31. The space behind the brick 21, 35, 51 is closed or sealed off bya facing wall of brick 52, resting on the lowermost brick 21 and 35, and on laterally extending engagement means 53 in the form of lugs projecting from the plates 46. These brick 52 serve to counterbalance the weight of the brickwork 49 at the other sides of the fantail sets 21, 35, and viceversa.

In the nose proper 45, the clamp 29 is replaced by a sort of T shaped hanger 54; rest ing on the lower flanges of the supporting I beams 28, and the projecting support 50 for the curtain brick 31 is detachably bolted 'to the upper outer corner of the plate46.

This allows this part 50 to be replaced in case (as is apt to happen) it is exposed and burned off as a result of erosion of the brick 31 and 51,without scrapping the entire plate 46 or taking down thewhole nose. The adjacent ends of the runners 10' are bolted to the plates 46 at 55, so that the weight of the brick atthis end of the main arch 7 helps to counterbalance that of the brick 31, etc,

and vice-versa. As shown, the plates 46 have upper extensions 56 away from their outer edges, to afford bolt holes 57 for attachment of the'hangers 54 in other positions, if found convemen Corresponding parts and features have been marked with like reference characters throughout the various views, as a means of dispensing with merely repetitive description in many instances.

I claim:

1. A refractory arch nose comprising supporting means, fantail sets of main nose brick with supports at intervals along said means, and fantail sets of filler brick between and supported by said main sets.

2. A refractory arch nose comprising superstructure, fantail sets of main nose brick,

'a support for each of the sets at intervals along said superstructure, fantail sets of filler brick between and supported by said main-sets, a secondset of supports carried 5. In furnace arch construction, the com bination of structural work extending transversely of the arch, a series of brick supporting members on said structural work, fantail sets of nose brick carried by said members, each set being pivoted thereon as a unit, curtain brick carried by said members and means for supporting bricks of the main arch from said members.

6. In furnace arch construction, the combination of overhead structural work, a brick supporting member secured thereto, curtain brick supported by said member, fantail sets of nose brick pivotally supported by said member, and means for supporting bricks of the main arch from said member. I

7 A refractory arch nose comprising a supporting structure, fantail sets of main nose brick, sector-like members secured to the structure, means for independently securing the brick of'each set to a sector-like member,

and fantail sets of filler brick between and carried by said main nose brick.

8. A refractory arch nose comprising a supporting structure, fantail sets of main nose brick, sector-like members pivotally secured to the structure, means for independently securing the brick of each set to a sectorlike member, and fantail sets of filler brick between and carried by said main nose brick.

9. A refractory arch structure comprising a supporting superstructure, brackets secured thereto at spaced intervals, fantail sets .of main nose brick, sector-like members pivotally secured to alternate brackets, means for independently securing the brick of each set to a sector-like member, fantail sets of filler brick between and carried by said main .nose brick, curtain wall brick supported by signed my name.

' BRADLEY DOBIE.

by said superstructure interposed between 1 those first mentioned, and curtain brick overlying said main and filler brick sets carried by all ofsaid supports.

3. An arch nose comprising supporting means, fan-tail sets of nose bri ck pivotally carried by said supporting means, and fan tail .sets of filler brick between and carried by said pivoted sets;

4. In furnace construct-ion, the combina tion of supporting structural work, a series of brick supporting members arranged on said structural work, fan-tail sets of nose,

' brick suspended from alternate supporting 

